Correct Answer - Option 2 : -240 dB/ decade

__Concept__:

A pole decreases the slope by 20 dB while a zero increases the slope by 20 dB.

With 'p' poles and 'z' zeroes only, the system will have have a maximum slope of:

(z - p) × 20 dB/decade

__Calculation__:

Given n = 14 and z = 2

Maximum slope will be:

(z - p) × 20 dB/decade

= 20 (2 - 14) dB/decade

= -240 dB/decade