Four statements are given below. Group two of them in such a way that one is logically impossible and the other is empirically (factually) possible.
1. A plane equilateral triangle can also be a plane right-angled triangle. (A)
2. Velocity of light in vacuum is constant. (B)
3. Consumption of fuel at this rate results in reversal to bullock-cart age. (C)
4. A tall man is a man. (D)
'B, D' is actually correct and 'A, B' is logically impossible because it is impossible for an equilateral triangle to become right angle triangle. So, option 'A, B' is correct.