Jumbled sentences she, operate, if, better, get, need, doesn't, the, will, to, doctor

The correct arrangement of the jumbled sentence is:

If she doesn't get better, the doctor will need to operate.

Explanation:

This sentence is type 1 of conditional sentences.

There are four common types of conditional sentences.

Type Zero:

It is used for general truths.

Examples:

If you don't work, you don't earn.

If people follow traffic rules, they are safe on roads.

Type One:

We use type one conditional sentences when the outcome of the condition is  likely but not certain.

Examples:

If she doesn't get better, the doctor will need to operate.

If he works hard, he will win the prize.

Type Two:

We use type two conditional sentence when the outcome/result of a condition is almost impossible,

Example:

If I won the election, I would make every citizen rich.

Type Three:

We use type three conditional sentences when a condition has not been fulfilled and as a result its outcome too does not happen.

Example:

If he had slept earlier, he would have got up in time.