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Option 1 is the correct answer.
Let`s dissect each option to understand them better:
Option 1: This option states that Idukki is a Thermal Power Station, Sabarigiri is a Hydroelectric Project, Ghatprabha is an Irrigation Project, and Ramganga is a Multipurpose Project. This option matches all the pairs correctly, making it the correct answer.
Option 2: This option states that Idukki is a Thermal Power Station, Sabarigiri is a Hydroelectric Project, and Ramganga is a Multipurpose Project. It does not include Ghatprabha, which is an Irrigation Project. Therefore, this option is incorrect.
Option 3: This option states that Ghatprabha is an Irrigation Project and Ramganga is a Multipurpose Project. It does not include either Idukki or Sabarigiri, which are both correctly matched pairs. Therefore, this option is incorrect.
Option 4: This option states that Sabarigiri is a Hydroelectric Project and Ghatprabha is an Irrigation Project. It does not include either Idukki or Ramganga, which are both correctly matched pairs. Therefore, this option is incorrect.
In conclusion,