Consider the following transfer functions:1. \(\frac{1}{{j\omega + 1}}\)2. \(\frac{1}{{{{\left( {j\omega + 1} \right)}^2}}}\) 3. \(\frac{1}{{\left( {j\omega + 1} \right)\left( {j\omega + 2} \right)}}\) The transfer functions which have a linear phase are:

Consider the following transfer functions:1. \(\frac{1}{{j\omega + 1}

1.	Consider the following transfer functions:1. \(\frac{1}{{j\omega + 1}}\)2. \(\frac{1}{{{{\left( {j\omega + 1} \right)}^2}}}\) 3. \(\frac{1}{{\left( {j\omega + 1} \right)\left( {j\omega + 2} \right)}}\) The transfer functions which have a linear phase are:
A.	1 and 2 only
B.	1 and 3 only
C.	2 and 3 only
D.	1, 2 and 3
Answer» E.