Subject: mathqa
Question: a and b began business with rs . 3000 and rs . 4000 after 8 months , a withdraws rs . 1000 and b advances rs . 1000 more . at the end of the year , their profits amounted to rs . 672 find the share of a .
Option: 
A: 388
B: 379
C: 122
D: 256
Answer: D