Amniotic fluid is used to:

(A) Determine the survivability of the foetus

(B) Massive child immunization

(C) Check for pneumonia

(D) Check genetic disorder

Choose the correct answer from the options given below:

(A), (B) and (D) only

The correct answer is Option (1) → (A), (B) and (D) only 

Note: There appears to be an error in the question or the options. Scientifically, the correct combination should be (A) and (D), which is not present among the given options.

(A) Determine the survivability of the foetus — Correct: Amniotic fluid analysis can assess fetal lung maturity and fetal well-being, which helps doctors judge whether the fetus can survive outside the womb.

(B) Massive child immunization — Incorrect: Immunization is done after birth. Amniotic fluid is not used for mass immunization.

(C) Check for pneumonia — Incorrect: Pneumonia is a post-birth respiratory infection. Amniotic fluid testing is not used to diagnose pneumonia.

(D) Check genetic disorder — Correct: Through amniocentesis, amniotic fluid is analyzed to detect genetic disorders such as Down syndrome, spina bifida, etc.

Therefore, scientifically the correct combination should be (A) and (D), but this option is not provided in the question.