Largest tissue of the body as?

A bedridden patient experiences acute chest pain which is worsened by breathing.Which imaging techniques could be helpful?
A. USG
B. X-ray chest
C. Ventilation perfusion scan
D. CT scan

Largest tissue of the body as?
A. Bones
B. Connective tissue
C. Nerous tissue
D. Muscles

A woman after normal labour suddenly goes into shock.What would be the probable diagnosis?
A. PPH
B. Inversion of uterus
C. Amniotic fluid embolism
D. Eclampsia