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.

Problem: the sector of a circle has radius of 24 cm and central angle 135 o. find its perimeter ?
Options: a. 91.5 cm, b. 11.5 cm, c. 104.6 cm, d. 92.5 cm, e. 99.5 cm
c

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

Problem: in a lottery there are 20 prizes and 35 blanks. a lottery is drawn at random. what is the probability of getting a prize
Options: a. 2 / 13, b. 4 / 11, c. 5 / 11, d. 6 / 11, e. 3 / 13

b