hey @rohit11, i think the simplest approach would be to load the fine-tuned model and tokenizer in a question-answering pipeline as follows:
from transformers import pipeline, AutoTokenizer, AutoModelForQuestionAnswering

model_checkpoint = "/path/to/your/model"
tokenizer = AutoTokenizer.from_pretrained(model_checkpoint)
model = AutoModelForQuestionAnswering.from_pretrained(model_checkpoint)
pipeline('question-answering', model=model, tokenizer=tokenizer)

you can consult the docs 28 for more information on the pipeline