Which of the following is the terminal method of contraception?

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Barrier	$(1)$ Copper-$T$
$(B)$ $IUD$	$(2)$ Vasectomy and tubectomy
$(C)$ Surgical technique	$(3)$ Condoms,cervical caps
$(D)$ Administering hormones	$(4)$ Oral pills and Saheli

Diaphragms are contraceptive devices used by females. Choose the correct option from the statements given below:
$i$. They are introduced into the uterus
$ii$. They are placed to cover the cervical region
$iii$. They act as physical barriers for sperm entry
$iv$. They act as spermicidal agents

What is the function of Copper-$T$?

Among the following methods,which one has the highest failure rate?

Lippe's loop is a type of contraceptive used as: