The sun has a __________ year solar cycle during which its activity increases and decreases.

A. 10

B. 11

C. 12
D. 13
The sun has a __________ year solar cycle during which its activity increases and decreases. | 11 | CSS, PMS, PPSC, FPSC, KPPSC, SPSC, ISSB and NTS Past Papers | Pakistan's Largest Online Past Papers Database

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