Answer: Option D - To improve aerodynamic stability during re-entry

Explanation:

• The "grid fins" on the SpaceX Falcon 9 rockets are used to improve aerodynamic stability during re-entry.
• Positioned on the rocket's booster, these fins help control its descent and ensure a safe landing by providing precise maneuverability.
• The grid fins act as aerodynamic surfaces, allowing the booster to steer itself back to Earth, especially when it re-enters the atmosphere after completing its mission.
• They play a key role in rocket reusability.

Answer: Option B - A payment to the victim’s family in case of unintentional homicide

Explanation:

• Under Islamic Sharia law, 'blood money' (diya) is a specified sum paid to the victim's family in cases of unintentional murder or homicide.
• The purpose is not to value human life, but to compensate for the loss and alleviate the family's suffering, particularly in terms of potential income loss.
• If the victim's family forgives the perpetrator, they can choose to accept diya instead of seeking retribution (qisas).

Answer: Option C -  Mass generation

Explanation:

• The Higgs boson is linked to the Higgs field, which is responsible for giving mass to elementary particles.
• As particles interact with the Higgs field, they acquire mass, a crucial aspect of the Standard Model of particle physics.
• The discovery of the Higgs boson in 2012 confirmed the existence of this field and its role in mass generation, helping to explain why particles have mass.

Answer: Option C - Fermions obey the Pauli exclusion principle, while bosons can occupy the same quantum state.

Explanation:

• Fermions, which include particles like electrons, obey the Pauli exclusion principle, meaning no two fermions can occupy the same quantum state simultaneously. They have half-integer spins (e.g., 1/2, -1/2).
• Bosons, such as photons, have integer spins (e.g., 0, 1) and do not follow the exclusion principle.
• Instead, multiple bosons can occupy the same quantum state, which is the basis of phenomena like Bose-Einstein condensation.

Answer: Option B - Provision of tax exemptions for three consecutive financial years

Explanation:

• The Startup India initiative provides tax exemptions for eligible startups for three consecutive financial years to encourage innovation and ease financial burdens.
• This feature, along with other measures like simplified compliance and funding support, aims to create a favorable environment for startups to grow.
• By reducing tax-related hurdles, the initiative helps startups focus on innovation and expansion, fostering entrepreneurship and job creation across the country.