Iter and next methods

Python Help
14

Dear James;
I modified the code as you said, but the output is the same as before. I mean it does not go to the next question and iterates first question. Do you have any idea helps me?
The total code is:

import telebot

bot = telebot.TeleBot('*************************************************************')  # Replace with your bot token

# Questions and answers stored in a dictionary
questions = {
    "What is the answer to question 1": "A",
    "What is the answer to question 2": "B",
    "What is the answer to question 3": "C"
}

# Initialize the current_question outside of the functions
current_question = None

# Start command handler
@bot.message_handler(commands=['start'])
def start_message(message):
    global current_question
    bot.reply_to(message, "Welcome to the Quiz Bot! Please answer the following questions:")
    # Start the question answering loop
    current_question=iter(questions)
    current_question = next(current_question, None)
    bot.send_message(message.chat.id, current_question)
# Answer handler
@bot.message_handler(func=lambda message: True)
def answer_question(message):
    global current_question
    # global questions  # Access the global questions dictionary
    # Check if the user's answer is correct for the current question
    correct_answer = questions[current_question]
    if message.text.lower() == correct_answer.lower():
        bot.reply_to(message, "Correct!")
        # Move on to the next question
        current_question=iter(questions)
        current_question = next(current_question, None)
        if current_question:
            bot.send_message(message.chat.id, current_question)
        else:
            bot.send_message(message.chat.id, "Congratulations! You have answered all the questions correctly.")
    else:
        bot.reply_to(message, "Incorrect. The answer is " + correct_answer + ".")

bot.polling()