A is father of B. B is sister of C. C is son of D. How is D related to A? MCQ with Answer and Explanation

Explanation:
Start North-West. +90° CW → North-East. Then 135° ACW from North-East: 135° ACW lands on North (North-East to North is 45°, to North-West 90°, to West 135°). Wait: from North-East ACW 135° is towards North then West: 45° to North, another 90° to West. So West. Option B.

Explanation:
From 15 August 2020 to 15 August 2021 there are 365 days. 365 ÷ 7 leaves remainder 1, so Saturday + 1 = Sunday.

Explanation:
These are consecutive perfect squares: 1²=1, 2²=4, 3²=9, 4²=16, 5²=25, so next is 6²=36.