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STD 11 - 15. Body fluids and criculations — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 15. Body fluids and criculations1 Mark
MCQ
The first heart sound is
  • A
    'Lubb' sound at the end of systole
  • B
    'Dub' sound at the end of systole
  • ✓
    'Lubb' sound at the beginning of systole
  • D
    'Dub' sound at the beginning of systole
✓

Answer

Correct option: C.
'Lubb' sound at the beginning of systole
c
It’s obvious.

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