What visa does my wife need to travel to the UK with me, if I'm going there on a business visa?

I am resident of India and just got UK Business visa ( 6 months, multiple entry) .. I am going for a week on business trip. I want to take my wife along with me and at the end of trip.. I want to extend my trip for 3 days and we want to spend some time on leisure.
What visa I should apply for my wife.. visitor visa? should she mention in the visa form that she is going along with me and staying with me while I am on work and later we are spending time on leisure.
While filling my business visa form, there was a field asking if anyone else is going with me.. I selected no.. as there were no plans.
Also is it ok to spend time on leisure on UK Business visa
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Does my wife need a visa to enter UK?
Spouse visa entry clearanceIf you are seeking to enter the UK on the basis of your relationship with a UK national you must apply for entry clearance before coming to the UK. If you are applying from inside the UK you must have leave to remain in the UK on a visa that is valid for six months at the time you apply.Can I apply for a spouse visa while on a tourist visa UK?
It is essentially a visa solely for the purpose of visiting the UK to get married, and nothing more. If you have been married in the UK to a British citizen or person settled in the UK whilst on a marriage visit visa, then you will have to leave the UK to apply for your spouse visa from overseas.Can a spouse come to UK on a visitor visa?
If you and your partner don't want to stay in the UK together, your partner can come to the UK on a marriage visitor visa.What are the requirements to bring a spouse to UK?
What you'll need to prove- you're in a civil partnership or marriage that's recognised in the UK.
- you've been living together in a relationship for at least 2 years when you apply.
- you are a fianc\xe9, fianc\xe9e or proposed civil partner and will marry or enter into a civil partnership in the UK within 6 months of arriving.
Can My Spouse Travel with Me as a Dependant? What to know before MOVING to the UK With Your Partner
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