If a Means +, b Means x, c Means¸, d Means -, Then 20a10b45c5d12=?

Answer: (1) 98

Explanation:-
a means +, b means x, c means /, d means -. 

20 a 10 b 45 c 5 d 12
Put the value of signs a means +, b means x, c means /, d means -. 
Then, 20 + 10 x 45 /5 – 12
 = 20 + 10 x 9 – 12
 = 90 + 8
 = 98

Hence, the correct answer is option (1) 98.