Question

In stickle cell anemia,…..1….. is substituted by …..2…. at …..3…. position of $\beta$-globulin chain.

\begin{tabular} { | c | c | c | c | } \hline & I & $\mathbf { 2 }$ & $\mathbf { 3 }$ \ \hline (a) & Glutamic acid & Phenylalanine & $3 ^ { \text {rd } }$ \ \hline (b) & Glutamic acid & Valine & 3 ^ { \text {rd } \ \hline (c) & Valine & Glutamic acid & $6 ^ { \text {th } }$ \ \hline (d) & Glutamic acid & Valine & $6 ^ { \text {th } }$ \ \hline \end{tabular}

• A. (a) Glutamic acid, Phenylalanine, 3rd
• A. (b) Glutamic acid, Valine, 3rd
• A. (c) Valine, Glutamic acid, 6th
• A. (d) Glutamic acid, Valine, 6th