text: yaar,mujhe lagta hai group study karna bahut faydemand hota hai, sab milke concepts discuss karte hain, aur kuch nahi samajh aaye toh ek dusre ki help bhi hoti hai!haan, aur agar koi topic samajh nahi aa raha ho toh usko samjhane se knowledge bhi aur strong hota hai, waise tumhe kaunsa subject sabse challenging lag raha hai?