Explanation

• O⁻ (O Negative) is the universal donor blood group.
• It can be transfused to A, B, AB, and O blood groups.
• O⁻ blood lacks A, B, and Rh (D) antigens.

Additional information:

• Universal Recipient: AB⁺ (AB Positive)
• ABO Blood Groups: A, B, AB, O
• Rh Types: Positive (+) and Negative (−)
• Total Common Blood Groups: 8 (A⁺, A⁻, B⁺, B⁻, AB⁺, AB⁻, O⁺, O⁻)

Last verified on 14-07-2026

Explanation

• The SI unit of electric current is Ampere (A).
• Electric current measures the flow of electric charge.
• Defined using the elementary charge (e = 1.602176634 × 10⁻¹⁹ C).
• Named after: André-Marie Ampère (scientist).
• 1 Ampere = 1 Coulomb per second (1 A = 1 C/s).

Last verified on 08-06-2026

Explanation

• We use “on the committee” for being a member of a committee.
• “On” is the correct preposition used with groups, boards, and committees.
• Example: She serves on the education committee.

Last verified on 12-05-2026

Explanation

Accumulate means جمع کرنا

• Spend means خرچ کرنا
• Lessen means کم کرنا
• Spread means بکھرنا یا تقسیم کرنا

Last verified on 23-03-2026

Explanation

• 2nd Constitution (1962): 250 articles, 10 parts, imposed by Ayub Khan during his first martial law.

• 1st Constitution (1956): 234 articles, 13 parts, adopted during civilian rule.
• 3rd Constitution (1973): 280 articles, 12 parts, introduced in Zulfikar Ali Bhutto’s era.
• First Martial Law: Imposed by Ayub Khan before the 1962 Constitution.

Explanation

10 men complete a job in 14 days, so the total work equals 10 men × 14 days.

With 4 men, the work remains the same, but takes longer.

Multiply the original duration by the ratio of men: 14 days × (10/4) = 35 days.

Therefore, 4 men take 35 days to finish the job at the same rate.

Explanation

Let's break this problem down step by step:

1. Let the distance between home and school be x km.
2. Time taken to go to school = Distance / Speed = x / 3
3. Time taken to return home = Distance / Speed = x / 2
4. Total time = 5 hours, so we can set up the equation: x / 3 + x / 2 = 5
5. To solve for x, we can find a common denominator (6) and add the fractions: (2x + 3x) / 6 = 5
6. Combine like terms: 5x / 6 = 5
7. Multiply both sides by 6 to eliminate the fraction: 5x = 30
8. Divide both sides by 5 to solve for x: x = 6

So, the correct answer is: 6 km

Explanation

"Pakistan's polio immunization campaign began in 1974, but eradication efforts officially started in 1994.

The country had the most polio cases worldwide in 2014."

Explanation

Negligent: Requirement :: Easy : Hard

Explanation

Day : Sun :: Night : Moon