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5. Given below is the diagram of human ear. Choose the correct labelling of the parts A,
               B and C.





























               (a) A-ear lobe, B-ear canal, C-auditory nerve


               (b) A-ear drum, B-auditory nerve, c-ear canal

               (c) A-ear canal, B-Eustachian tube, C-auditory nerve


               (d) A-ear canal, B-Eustachian tube, C-cochlea


               6. Which part of human ear converts sound vibrations into electrical signals

                  a. Hammer

                  b. Stirrup

                  c. Tympanic membrane

                  d. Cochlea


               SUBJECTIVE

               1. Explain the construction and working of human ear.









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