Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Q: Problem: if the sides of a triangle are 26 cm, 24 cm and 15 cm, what is its area ?
Options: a. 120, b. 772, c. 180, d. 266, e. 2848

A: c
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Q: Problem: 50 % of a number is more than 40 % of 120 by 180. find the number ?
Options: a. 456, b. 480, c. 420, d. 445, e. 320

A: a
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Q: Problem: in a company the manager wants to give some gifts to all of the workers. in each block there are about 100 workers are there. the total amount for giving the gifts for all the workers is $ 4000. the worth of the gift is $ 4. how many blocks are there in the company ?
Options: a. 12, b. 10, c. 15, d. 17, e. 20

A:
b
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