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ANSWER:
IN AP WITH d=4
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HEY DEAR
GOOD MORNING
SO, YOUR ANSWER IS
OPTION B
REASON - NUMBER IS IN AP WHEN THERE DIFFERENCE OR d BETWEEN SAME this series D SAME ......
LIKE IF YOU SUBTRACT -7+11
YOU WILL GET D=4
AND IF YOU SUBTRACT-3+7
YOU WILL GET D= 4
AND IF YOU SUBTRACT 1+3
YOU WILL GET D=4
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