A. We know that 1 crore = 1, 00, 00, 000 million

= 10, 000, 000

= 10 1, 000, 000

= 10 million

Therefore, 1crore = 10 million

So, 10 million = 1 crore

B. We know that 10 lakh = 10, 00, 000

= 1, 000, 000

= 1 million

Therefore, 10 lakhs = 1 million