An adult came to casualty with complaints of rapid hea rate. On examination everything else was normal except for episodic tachycardia and occasional extra-systole and amblyopia. Which of the following is the cause of it?

Explanation

Answer- A. NicotineNicotine chronic poisoning can lead to cough, wheezing, dyspnoea, anorexia, vomiting, diarrhea, anaemia, faintness,tremors, impaired memory, amblyopia, blindness, irregularities, of the hea with extra-systoles and occasionally attacks pain suggesting angina pectoris.