Search for: ZoologyVolume of thoracic chamber increases in the vertical axis due to Volume of thoracic chamber increases in the vertical axis due to AContraction of external inter-costal musclesBRelaxation of external inter-costal musclesCRelaxation of diaphragmDContraction of diaphragm Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:The Correct option is D i.e., Contraction of diaphragm