Option (a) is correct

For 2011, State x

Renewable energy = 20+10 = 30

State y,  Renewable energy = 15+8 = 23

Total = 30+23 = 53

For 2021, State x

Renewable energy = 28+15 = 43

State y,   Renewable energy = 20+10 = 30

Total = 43+30 = 73

Increase = 73-53 = 20

Average increase = 20/2 = 10

विकल्प (a) सही है

2011 के लिए,

राज्य x अक्षय ऊर्जा = 20 + 10 = 30

राज्य y अक्षय ऊर्जा = 15 + 8 = 23

कुल = 30 + 23 = 53

2021 के लिए,

राज्य x अक्षय ऊर्जा = 28 + 15 = 43

राज्य y अक्षय ऊर्जा = 20 + 10 = 30

कुल = 43 + 30 = 73

वृद्धि = 73 - 53 = 20

औसत वृद्धि = 20/2 = 10%