Task: Question Answering
Input (English): Problem: in a particular city there are 100 homes numbered from 1, 23,.., 100. the city was build by a builder from chennai. there was 4 to 5 shops in the town which was build by a builder from mumbai. the 2 nd builder can build in 1 ½ times as compared to time by 1 st builder. the 2 nd builder builds in 15 days, then how many 2 ' s are used by the builder from chennai in numbering the 100 homes ?
Options: a. 17, b. 18, c. 19, d. 20, e. 21
Output (English): d