What is the sex-ratio in India as per 2011 Census?

The correct answer is D. The 2011 Census recorded an overall sex ratio of 943 females per 1000 males, which matches none of the three figures given. Option A (940) is the closest, but it is an approximation, not the census figure, so the question does not accept it.

Why the others fail: 950 and 960 are both well away from 943. Census figures are reported exactly, not rounded to the nearest ten, so a neat round number in a factual question should always be checked against the actual figure.

Core concept: sex ratio is defined as females per 1000 males. It rose from 933 in 2001 to 943 in 2011. However, the child sex ratio (0-6 years) fell to 919 in 2011 from 927 in 2001, and that is the more worrying trend. This links to Mains GS-1 on population and social issues, and to the PC&PNDT Act, 1994, and Beti Bachao Beti Padhao (launched 2015).

Trap: picking A because 940 looks nearest to the real value, when the exam tests the exact census figure.