Prefer a reply to this memo, citing the compelling reasons under which you had to take this emergency leave. Attach all the relevant documentary proofs along with your reply, such as hospital records, medical prescription of the Doctor etc. Request them to drop the charges against you/. 

See you can reply to the Memo stating the emergency and can attach the medical documents of daughter in your reply. The office can withdraw the memo. 

You should reply,  give a reply mentioning facts. Let your reply be in chronological order. Attach medical certificate to your reply.

You can reply to the same.  Nothing to worry they can't terminate you. 

You should give up befitting reply narrating the reasons of your absence from work and also enclose the hospital records of your daughter along with your reply.

Submit your reply 

enclose copy of your daughter hospitalisation records 

mention due to your daughter sudden hospitalisation you could not attend office on Monday 

Dear Sir,

Please reply the said notice with the help of experience advocate enclosing medical records of your daughter.  If any further action is initiated by your office then approach Central Administrative Tribunal, Bangalore Branch and get stay order.

Give them medical of daughter.

If you have received a notice then you may give a reply stating that you were unable to return due to the situation at home was this and you may even produce the medical certificate in this regard  as documentary evidence to satisfy them, if they still insist on any action, you may challenge them legally when such a situation arise.