In the following equations four out of the five parts numbered (1), (2), (3), (4) and (5) are exactly equal. Which one part is not equal to the other four? The number of that part is the answer.

A) \( \Large 120 \times 12 - 22 \times 20 = \)
B) \( \Large 10% of 500 + \frac{2}{5} of 1200 = \)

C) \( \Large 80 \times 40 - 20 \times 110 = \)
D) \( \Large 8640 \div 60 + 53.5 \times 16 = \)

Correct answer:
B) \( \Large 10% of 500 + \frac{2}{5} of 1200 = \)

Description for Correct answer:
(1) \( \Large 120 \times 12 - 22 \times 20 \)

= 1440 - 440 = 1000

(2) \( \Large 10 % of 5000 + \frac{2}{5} of 1200 \)

= \( \Large \frac{10}{100} \times 5000 + \frac{2}{5} \times 1200 \)

= 500 + 480 = 980

(3) \( \Large 80 \times 40 - 20 \times 110 \)

= 3200 - 2200 = 1000

(4) \( \Large 8640 \div 60 + 53.5 \times 16 \)

= 144 + 856 = 1000

(5) 5314 - 3029 - 1285

= 2285 - 1285 = 1000

Please provide the error details in above question

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