B. 83 / 83
ExplanationStep 1: In the AP a = 7 and d = 4. Step 2: a20 = a + 19d = 7 + 76 = 83. Step 3: In nth term add the common difference n-1 times.
Step 1: AP में a = 7 और d = 4 है। Step 2: a20 = a + 19d = 7 + 76 = 83। Step 3: nth term में n-1 times common difference जोड़ा जाता है।
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