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Ravi Ranjan Kumar
Founder of "The Selection Guru" Competitive Institute.Qualified:more than half a dozen govt.Exams.Youtube channels "UnBook" & "UnBook Talks"
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Arun nagar
a year ago
thanks sir
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Ashutosh Jha
3 months ago
खुबभे बढ़िया से पढ़ा और समझा रहे हैं सर आप।। धन्यवाद
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Sagar RS Kumar
8 months ago
thank u sir bahut accha video tha basically samjhane ka tarika badhiya tha
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RK
Ranbir Kumar
7 months ago
very good
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Archana Bharti
8 months ago
thank u sir
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Ranju Singh
a year ago
Sir chemistry aur physics ka video bhi apload kriye
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Ravi Ranjan Kumar
a year ago
Pahle se hi physics aur chemistry ka course publish kar chuka hun.Ranju please search and watch.
Ranju Singh
a year ago
thank you sir
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