In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

[EX Q]: Question: Of the following pairs of surface molecules, what is used by the virgin T lymphocytes to extravasate to the lymph node?
Options: <1> CCR7 and L-selectin. <2> VCAM and L-selectin. <3> CCR7 and ICAM-1. <4> CCR9 and L-selectin. <5> CCR4 and VCAM-1.
[EX A]: 1

[EX Q]: Question: What cognitive technique is used in Rational Emotive Behavior therapy to help people who have intellectual difficulties?
Options: <1> Reduction to the absurd. <2> Cognitive distraction <3> Training in social skills. <4> Rational-emotive imagination. <5> Training in self-instructions.
[EX A]: 5

[EX Q]: Question: The specific test to be performed as a previous step to the insertion of a catheter in the radial or ulnar artery, in order to evaluate the presence of an adequate collateral circulation of the hand, is called:
Options: <1> Spencer test modified. <2> Tolerance test for arterial catheterization. <3> Student's test <4> Allen test. <5> Tilt Test (TTT).
[EX A]:
4