1. Following are the stages of pathway for conduction of an action potential through the heart:
A. AV bundle
B. Purkinje fibres
C. AV node
D. Bundle branches
E. SA node
Choose the correct sequence of pathway from the options given below:

(1).B-D-E-C-A

(2). E-A-D-B-C

(3). E-C-A-D-B

(4). A-E-C-B-D

2. Match List I with List II:

Choose the correct answer from the options given below:

(1).A-II, B-III, C-I, D-IV

(2). A-IV, B-II, C-I, D-III

(3). A-I, B-III, C-IV, D-II

(4). A-III, B-II, C-IV, D-I

3. 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 :

(1).A, B and D Only

(2). A, B and C Only

(3). A, B, C and D

(4). A, C and D Only