A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was…

Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones Choose the correct answer from the options given below :

A person with blood group $\mathrm{ARh}^{-}$can receive the blood transfusion from which of the following types? A. $\mathrm{BRh}^{-}$ B. $\mathrm{ABRh}^{-}$ C. $\mathrm{ORh}^{-}$ D. $\mathrm{ARh}^{-}$ E. $\mathrm{ARh}^{*}$ Choose the correct answer from the options given below :

The mother has $\mathrm{A}+$ blood group the father has $\mathrm{B}+$ and the child is $\mathrm{A}+$. What can be the possibility of genotypes of all three, respectively? A. $\quad I^A I^A\left|I^B i\right| I^B i$ B. $\quad I^A I^A\left|I^B i\right| I^A i$ C. $\quad I^B i\left|I^A I^A\right| I^A I^B$ D. $\quad I^A I^A\left|I^B I^B\right| I^A i$ E. $\quad I^A i\left|I^B i\right| I^{A_i}$ Choose the correct answer from the option given below:

Match List I with List II : \begin{array}{|l|l|l|l|}\hline & List I & & List II \\\hline A. & P wave & I. & Heart muscles are electrically silent. \\\hline B. & QRS complex & II. & Depolarisation of ventricles. \\\hline C. & T wave & III. & Depolarisation of atria. \\\hline D. & T-P gap & IV. & Repolarisation of ventricles. \\\hline\end{array} Choose the correct answer from the options given below :

Given below are two statements : Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes. In the light of above statements, choose the most appropriate answer from the options given below :