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Directions $(3-5) :$ In each of the following questions, one number is wrong in the series. Find out the wrong number.

$3, 5, 12, 39, 154, 772, 4634 :$

1. $5$
2. $3$
3. $39$
4. $154$

The given series having following pattern:

• $3*1+2=3$
• $5*2+2=12$
• $12*3+2=38 \rightarrow (39)$ is wrong term here.
• $38*4+2=154$
• $154*5+2=772$
• $772*6+2=4634$

$\therefore$ Option $(C)$ is correct here.

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