In this task, you need to provide the correct option for a given problem from the provided options.

[EX Q]: Problem: teas worth rs . 126 per kg and rs . 135 per kg are mixed with a third variety in the ratio 1 : 1 : 2 . if the mixture is worth rs 152 per kg , the price of the third variety per kg will be ? 
Options: a ) rs . 147.50 , b ) rs . 785.50 , c ) rs . 174.50 , d ) rs . 258.50 , e ) none of these
[EX A]: c

[EX Q]: Problem: 99 ! how many zero ' s ? 
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
[EX A]: c

[EX Q]: Problem: on multiplying a number f by 153 , the result obtained was 102325 . however , it is found that both the 2 ' s are wrong . find the correct result . 
Options: a ) 104345 , b ) 107375 , c ) 108385 , d ) 109395 , e ) 105355
[EX A]:
d