The given series is in the below pattern,
First term = 2
Second term = First term + 13
? Second term = 2 + 13 = 3 ;
Third term = Second term + 23
? Third term = 3 + 23 = 11 ;
Similarly , we can find the all others terms also.
Fourth term = Third term + 42
? Fourth term = 11 + 33 = 38 ;
Fifth term = Fourth term + 52
? Fifth term = 38 + 43 = 102
Sixth term = Fifth term + 62
? Sixth term = 102 + 53 = 229 ; 229 is wrong. It should be 227.
Seventh term = Sixth term + 72
? Seventh term = 227 + 63 = 443
Hence, 229 is wrong. It should be 227.
They are units of measurement.
The knot is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately.
The Watt is a unit of power.
A fathom is a unit of length in the imperial and the U.S. customary systems equal to 6 feet (1.8288 metres).
They are terms connected with black magic.
All these are the pieces in the game of chess.
They have steel plants.
They are famous for oil fields.
It is irrelavent
Clearly, though all the alternatives may form a part of the atmosphere, the air is the most vital part, without which there can be no atmosphere. So, the answer is (b).
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