Expanded Form of the Number 345600

To expand the number 345600, we need to break it down into its place values and express each place value in words.

Place Values:
To understand how to expand the number, let's look at the place values of each digit in 345600:
- Lakh: The digit in the sixth place from the right is in the lakh place.
- Thousand: The digit in the fifth place from the right is in the thousand place.
- Hundred: The digit in the fourth place from the right is in the hundred place.
- Ten: The digit in the third place from the right is in the ten place.
- Unit: The digit in the second place from the right is in the unit place.

Now, let's expand the number 345600:

a) Three lakh six hundred:
- The digit in the lakh place is 3.
- The digit in the hundred place is 4.
- The digit in the ten place is 5.
- The digit in the unit place is 6.

So, we can write the number 345600 as "Three lakh six hundred."

b) Forty-five thousand six hundred:
- The digit in the thousand place is 4.
- The digit in the hundred place is 5.
- The digit in the ten place is 6.
- The digit in the unit place is 0.

So, we can write the number 345600 as "Forty-five thousand six hundred."

c) Three lakh forty-five thousand:
- The digit in the lakh place is 3.
- The digit in the thousand place is 4.
- The digit in the hundred place is 5.
- The digit in the ten place is 0.

So, we can write the number 345600 as "Three lakh forty-five thousand."

d) Three lakh forty-five thousand six hundred:
- The digit in the lakh place is 3.
- The digit in the thousand place is 4.
- The digit in the hundred place is 5.
- The digit in the ten place is 6.
- The digit in the unit place is 0.

So, we can write the number 345600 as "Three lakh forty-five thousand six hundred."

Conclusion:
The correct expanded form of the number 345600 is "Three lakh forty-five thousand six hundred."