1. 

In a certain code, '975' means 'throw away garbage', '528' means 'give away smoking' and '213' means 'smoking is harmful'. Which digit in that code means 'smoking'?
A. 5
B. 8
C. 2
D. 3

Answer: Option C

Explanation:

According to the given information,

9 7 5 throw away garbage     .........(i)

5 2 8 give away smoking       .........(ii)

2 1 3 smoking is harmful       ........(iii)

From Eqs. (ii) and (iii), smoking ----> 2